Capistrano Notifo notification recipe w/ growlnotify fallback

notifo.rb

# ~/.recipes/growl.rb
#
# Notifo setup in deploy scripts:
#   set :notifo_service "NOTIFO_SERVICE_NAME"           # Only if different from :application
#   set :notifo_service_secret "NOTIFO_API_SECRET"      # Only if different from application name
#   set :notifo_subscriber_list "username1, username2"  # Define default below to your username
#   set :notifo_hostname 'example.com'                  # Defaults to :server_hostname. Set to empty string to use Notifo default

require 'notifo' rescue nil

namespace :notifo do
  task :notify do
    notifo_send(ENV['NOTIFO_MESSAGE'])
  end
end

after :deploy do
  ENV["NOTIFO_MESSAGE"] = "Successfully deployed to #{fetch(:notifo_hostname, fetch(:server_hostname))}"
  notifo.notify
end

after :rollback do
  ENV["NOTIFO_MESSAGE"] = "Rolled back #{fetch(:notifo_hostname, fetch(:server_hostname))}"
  notifo.notify
end

def notifo_send(message)
  # TODO Combine with params
  notifo_service          = fetch(:notifo_service, fetch(:application))
  notifo_service_secret   = fetch(:notifo_service_secret)
  notifo_hostname         = fetch(:notifo_hostname, fetch(:server_hostname))
  notifo_subscriber_list  = fetch(:notifo_subscriber_list)

  begin
    if notifo_service_secret && notifo_subscriber_list

      params = {
        :username => notifo_service,
        :secret => notifo_service_secret,
        :title => "Deploy",
        :message => message,
        :uri => notifo_hostname ? "http://#{notifo_hostname}" : nil
      }

      notifo = Notifo.new(params)
      notifo_subscriber_list.split(',').each do |username|
        # Ensure user is subscribed
        # TODO Decide if this should happen every time?
        puts "Notifo - Add Subscriber #{username.inspect} # => " + notifo.subscribe_user(username.strip).parsed_response['response_message']
        # TODO only send if subscribed
        puts "Notifo - Send Notification # => " + notifo.send_notification(params.merge!(:to => username.strip)).parsed_response['response_message']
      end

      return
    end
  rescue
    puts 'Notifo gem is not installed. Please run "gem install notifo". Falling back to growlnotify'
  else
    puts 'Something went wrong with Notifo. Please see above.'
  end

  `growlnotify -n Capistrano -m #{message.inspect} Capistrano`
end